Add zoom extension API

chrome/renderer/render_view.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/renderer/render_view.h"
 
 #include <algorithm>
 #include <cmath>
 #include <string>
 #include <vector>
@@ skipping 4465 matching lines @@
     } else {
       // We're going towards 100%, so first go to the next whole number.
       zoom_level = static_cast<int>(old_zoom_level);
     }
   }
 
   webview()->setZoomLevel(false, zoom_level);
   zoomLevelChanged();
 }
 
-void RenderView::OnSetZoomLevel(double zoom_level) {
-  // Don't set zoom level for full-page plugin since they don't use the same
-  // zoom settings.
-  if (webview()->mainFrame()->document().isPluginDocument())
-    return;
-
+void RenderView::OnSetZoomLevel(int request_id, double zoom_level) {
   webview()->hidePopups();
   webview()->setZoomLevel(false, zoom_level);
-  zoomLevelChanged();
+  zoomLevelChanged(request_id);
 }
 
 void RenderView::OnSetContentSettingsForLoadingURL(
     const GURL& url,
     const ContentSettings& content_settings) {
   host_content_settings_[url] = content_settings;
 }
 
 void RenderView::OnSetZoomLevelForLoadingURL(const GURL& url,
                                              double zoom_level) {
@@ skipping 1161 matching lines @@
   int minimum_percent = static_cast<int>(
       WebView::zoomLevelToZoomFactor(minimum_level) * 100);
   int maximum_percent = static_cast<int>(
       WebView::zoomLevelToZoomFactor(maximum_level) * 100);
 
   Send(new ViewHostMsg_UpdateZoomLimits(
       routing_id_, minimum_percent, maximum_percent, remember));
 }
 
 void RenderView::zoomLevelChanged() {
+  // Currently only extension zoom requests have a request id
+  zoomLevelChanged(-1);
+}
+
+void RenderView::zoomLevelChanged(int request_id) {
   bool remember = !webview()->mainFrame()->document().isPluginDocument();
 
   // Tell the browser which url got zoomed so it can update the menu and the
   // saved values if necessary
   Send(new ViewHostMsg_DidZoomURL(
-      routing_id_, webview()->zoomLevel(), remember,
+      routing_id_, request_id, webview()->zoomLevel(), remember,
       GURL(webview()->mainFrame()->url())));
 }
 
 bool RenderView::IsNonLocalTopLevelNavigation(
     const GURL& url, WebKit::WebFrame* frame, WebKit::WebNavigationType type) {
   // Must be a top level frame.
   if (frame->parent() != NULL)
     return false;
 
   // Navigations initiated within Webkit are not sent out to the external host
@@ skipping 90 matching lines @@
   }
 }
 
 void RenderView::OnContextMenuClosed(
     const webkit_glue::CustomContextMenuContext& custom_context) {
   if (custom_context.is_pepper_menu)
     pepper_delegate_.OnContextMenuClosed(custom_context);
   else
     context_menu_node_.reset();
 }